diff options
Diffstat (limited to 'net/mptcp')
| -rw-r--r-- | net/mptcp/Kconfig | 1 | ||||
| -rw-r--r-- | net/mptcp/options.c | 19 | ||||
| -rw-r--r-- | net/mptcp/protocol.c | 56 | ||||
| -rw-r--r-- | net/mptcp/protocol.h | 4 |
4 files changed, 46 insertions, 34 deletions
diff --git a/net/mptcp/Kconfig b/net/mptcp/Kconfig index 49f6054e7f4e..a9ed3bf1d93f 100644 --- a/net/mptcp/Kconfig +++ b/net/mptcp/Kconfig @@ -4,6 +4,7 @@ config MPTCP depends on INET select SKB_EXTENSIONS select CRYPTO_LIB_SHA256 + select CRYPTO help Multipath TCP (MPTCP) connections send and receive data over multiple subflows in order to utilize multiple network paths. Each subflow diff --git a/net/mptcp/options.c b/net/mptcp/options.c index 45acd877bef3..fd2c3150e591 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -334,6 +334,8 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb, struct mptcp_sock *msk; unsigned int ack_size; bool ret = false; + bool can_ack; + u64 ack_seq; u8 tcp_fin; if (skb) { @@ -360,9 +362,22 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb, ret = true; } + /* passive sockets msk will set the 'can_ack' after accept(), even + * if the first subflow may have the already the remote key handy + */ + can_ack = true; opts->ext_copy.use_ack = 0; msk = mptcp_sk(subflow->conn); - if (!msk || !READ_ONCE(msk->can_ack)) { + if (likely(msk && READ_ONCE(msk->can_ack))) { + ack_seq = msk->ack_seq; + } else if (subflow->can_ack) { + mptcp_crypto_key_sha(subflow->remote_key, NULL, &ack_seq); + ack_seq++; + } else { + can_ack = false; + } + + if (unlikely(!can_ack)) { *size = ALIGN(dss_size, 4); return ret; } @@ -375,7 +390,7 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb, dss_size += ack_size; - opts->ext_copy.data_ack = msk->ack_seq; + opts->ext_copy.data_ack = ack_seq; opts->ext_copy.ack64 = 1; opts->ext_copy.use_ack = 1; diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 73780b4cb108..3c19a8efdcea 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -543,6 +543,11 @@ static void __mptcp_close_ssk(struct sock *sk, struct sock *ssk, } } +static unsigned int mptcp_sync_mss(struct sock *sk, u32 pmtu) +{ + return 0; +} + static int __mptcp_init_sock(struct sock *sk) { struct mptcp_sock *msk = mptcp_sk(sk); @@ -551,6 +556,7 @@ static int __mptcp_init_sock(struct sock *sk) __set_bit(MPTCP_SEND_SPACE, &msk->flags); msk->first = NULL; + inet_csk(sk)->icsk_sync_mss = mptcp_sync_mss; return 0; } @@ -643,7 +649,7 @@ static struct ipv6_pinfo *mptcp_inet6_sk(const struct sock *sk) } #endif -struct sock *mptcp_sk_clone_lock(const struct sock *sk) +static struct sock *mptcp_sk_clone_lock(const struct sock *sk) { struct sock *nsk = sk_clone_lock(sk, GFP_ATOMIC); @@ -755,60 +761,50 @@ static int mptcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen) { struct mptcp_sock *msk = mptcp_sk(sk); - int ret = -EOPNOTSUPP; struct socket *ssock; - struct sock *ssk; pr_debug("msk=%p", msk); /* @@ the meaning of setsockopt() when the socket is connected and - * there are multiple subflows is not defined. + * there are multiple subflows is not yet defined. It is up to the + * MPTCP-level socket to configure the subflows until the subflow + * is in TCP fallback, when TCP socket options are passed through + * to the one remaining subflow. */ lock_sock(sk); - ssock = __mptcp_socket_create(msk, MPTCP_SAME_STATE); - if (IS_ERR(ssock)) { - release_sock(sk); - return ret; - } + ssock = __mptcp_tcp_fallback(msk); + if (ssock) + return tcp_setsockopt(ssock->sk, level, optname, optval, + optlen); - ssk = ssock->sk; - sock_hold(ssk); release_sock(sk); - ret = tcp_setsockopt(ssk, level, optname, optval, optlen); - sock_put(ssk); - - return ret; + return -EOPNOTSUPP; } static int mptcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *option) { struct mptcp_sock *msk = mptcp_sk(sk); - int ret = -EOPNOTSUPP; struct socket *ssock; - struct sock *ssk; pr_debug("msk=%p", msk); - /* @@ the meaning of getsockopt() when the socket is connected and - * there are multiple subflows is not defined. + /* @@ the meaning of setsockopt() when the socket is connected and + * there are multiple subflows is not yet defined. It is up to the + * MPTCP-level socket to configure the subflows until the subflow + * is in TCP fallback, when socket options are passed through + * to the one remaining subflow. */ lock_sock(sk); - ssock = __mptcp_socket_create(msk, MPTCP_SAME_STATE); - if (IS_ERR(ssock)) { - release_sock(sk); - return ret; - } + ssock = __mptcp_tcp_fallback(msk); + if (ssock) + return tcp_getsockopt(ssock->sk, level, optname, optval, + option); - ssk = ssock->sk; - sock_hold(ssk); release_sock(sk); - ret = tcp_getsockopt(ssk, level, optname, optval, option); - sock_put(ssk); - - return ret; + return -EOPNOTSUPP; } static int mptcp_get_port(struct sock *sk, unsigned short snum) diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 8a99a2930284..9f8663b30456 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -56,8 +56,8 @@ #define MPTCP_DSS_FLAG_MASK (0x1F) /* MPTCP socket flags */ -#define MPTCP_DATA_READY BIT(0) -#define MPTCP_SEND_SPACE BIT(1) +#define MPTCP_DATA_READY 0 +#define MPTCP_SEND_SPACE 1 /* MPTCP connection sock */ struct mptcp_sock { |